Window Motor BMW G20 G21 Rear Door Left N/S Lifter Drive Motor 8495867

Window Motor BMW G20 G21 Rear Door Left N/S Lifter Drive Motor is an original component from the Window regulators and motors group, designed for the rear left window in the BMW 3 Series G20/G21 body style. This used motor ensures a factory-fit, maintaining the correct window operation geometry and stable integration with the vehicle's electrical system.

Specifications and technical data

• SKU: 8495867
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8495867
• Substitutable numbers: 8495867, 51358495867
• Location on the vehicle: Rear, Left
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The window lift motor is responsible for the precise raising and lowering of the window in the rear left door, working in conjunction with the guide mechanism and controls from the door panel and comfort module. Its placement in the rear – left side zone ensures that the component is structurally matched to the specific mounting position, which eliminates issues with window geometry, closing, and sealing.

Thanks to the use of an original BMW solution, the correct operating characteristics are maintained – smooth movement, appropriate speed, and compatibility with factory anti-trap safety features (if present in the vehicle's specific configuration).

Benefits of using an original window lift motor

Choosing this component primarily offers:

• factory fitment to the door's electrical and mechanical systems,
• stable cooperation with comfort control modules,
• maintenance of the correct window position within the guides,
• reduced risk of jamming, noise, and uneven operation of the lift.

The original motor from the Window regulators and motors group allows you to avoid problems typical of aftermarket replacements with uncertain parameters, such as incorrect connectors, different gear ratios, or varying electrical characteristics.

Component condition and installation aspects

The presented motor is in used condition, which in practice means maintaining the factory design while offering cost-effectiveness compared to a new component. This is a particularly beneficial solution for maintenance repairs where combining quality with a reasonable budget is key.

The component is prepared for installation in the rear left position, which facilitates the mechanic's work – there is no need for adaptation or modification of mounts, provided that the selection for the specific G20/G21 body version has been correctly verified. Before installation, it is recommended to perform a standard check of the condition of the guide mechanism and window seals to ensure even load on the motor.

Selection and compatibility with BMW G20/G21

The motor was designed with the electrical architecture of the BMW 3 Series G20/G21 in mind, allowing it to work with factory wiring harnesses, connectors, and window control logic. In practice, this translates to:

• proper operation of the comfort opening and closing functions,
• consistency with safety systems and rear window locks,
• no need for wiring modifications or the use of adapters.

Before purchasing, it is worth comparing the vehicle's equipment configuration and the mounting side to ensure full compatibility with your BMW version.

Expanding repairs within the BMW window system

If you are planning a comprehensive repair or upgrade of the side window area in your BMW and need other elements from the same group, such as motors, regulators, or complete lift mechanisms, check the available parts in the BMW Window regulators and motors category.

Technical knowledge and BMW operation

For users interested in a broader context of BMW engine operation and potential service costs, an article describing critical engines in the popular 3 Series model may be helpful. More information can be found in the material: Faulty BMW E90 engines: check what can ruin your budget!

If you want to further optimize service costs while also caring for the environment, it is worth reading the guide on making informed choices regarding used components, available here: Eco-driving: discover the benefits of used car parts.